Searcy
Clear Sky Chart
History

This sumarizes the distribution of each different forecast outcome for the Searcy clear sky chart from 2005-11-06 to 2026-06-16.

This page is a summary of past forecasts. Even though it's based only on forecasts, some people use these pages as clue to a site's climate. But climate data based on actual observation should be preferred (if you can find it!).

Cloud, Transparency and Seeing forecasts are summarized individually. But because good observing conditions require a combination of minimum cloud cover, transparency and seeing, the individual forecast summaries can be difficult to interpret. The observing conditions section counts the combinations of conditions needed for common types of astronomical observation.

Observing Conditions

The following tables count the occurrence of the combinations of forecast and darkness conditions needed for different observations. Conditions are rated by by what percentage of the hours the observation would likely be attempted are usable.

Observation Type	Minimum conditions for hour to be usable				Out of hours
	Clear of Clouds	Transparency	Seeing	Sky Brightness
Planetary:	50%	(no limit)	Average	(no limit)	Nighttime Hours
Deep Sky:	70%	Average	(no limit)	5.9	Nighttime Hours
CCD Imaging:	70%	Below Average	Poor	(no limit)	Nighttime Hours

Percentages are of nighttime hours per month, or per year, when a particular observing conditions was met. Deep Sky percentages never exceed 50% because the moon is up half the time. Deep sky percentages are much lower for charts at high latitudes because of fewer dark hours in the summer.

Overall

By Month

Individual Forecasts

The length of each colored bar in the "occurrence of each Forecast" column is proportional to the number of times the chart forecast that color. The percentages are of the total number of hours per month, or per year, with a particular forecast. The colors as the same as those used in clear sky charts.

Note: Transparency probabilities are only counted for those hours that have 30% or less cloud cover. Seeing probabilities are only counted for those hours that have 80% or less cloud cover. If that's too tricky, try Observing Conditions instead.

Overall

		Occurrence of each Forecast	Data Points
Cloud Cover	Day	13% 6% 2 6% 4 4 4 3 5% 7% 45%	136839
	Night	13% 6% 2 5% 4 3 4 3 5% 6% 49%	135459
Transparency	Day	37% 6% 10% 24% 19% 5%	140446
	Night	35% 5% 9% 23% 21% 7%	139933
Seeing	Day	14% 7% 22% 26% 22% 9%	17520
	Night	15% 6% 25% 33% 19% 2	27335

By Month

Percentage Cloud Cover SE (2006-)
Color Meanings: Overcast 90% covered 80% covered 70% covered 60% covered 50% covered 40% covered 30% covered 20% covered 10% covered Clear
Month	Days in Month		Occurrence of each Forecast	Data Points
January	1st to 10th	Day	17% 6% 2 6% 3 3 3 3 4 5% 47%	5289
	11th to 20th	Day	10% 7% 2 6% 4 3 3 2 3 4 55%	5310
	21st to end	Day	20% 6% 2 5% 3 2 2 2 4 5% 49%	5812
February	1st to 10th	Day	21% 8% 2 5% 4 3 3 3 4 4 42%	1890
	11th to 20th	Day	18% 6% 2 7% 5% 3 4 3 5% 5% 42%	2029
	21st to end	Day	21% 8% 2 5% 4 4 4 3 4 6% 39%	1730
March	1st to 10th	Day	20% 9% 3 7% 5% 4 4 3 4 5% 37%	5001
	11th to 20th	Day	10% 6% 2 5% 4 3 4 3 5% 6% 53%	5090
	21st to end	Day	14% 8% 3 7% 4 4 4 3 4 5% 45%	5690
April	1st to 10th	Day	16% 5% 2 5% 4 4 3 3 5% 7% 46%	2520
	11th to 20th	Day	14% 6% 3 6% 4 5% 3 3 4 6% 45%	2494
	21st to end	Day	15% 6% 3 6% 5% 5% 5% 3 5% 7% 39%	2520
May	1st to 10th	Day	15% 8% 3 7% 4 4 4 4 6% 6% 39%	7021
	11th to 20th	Day	12% 6% 3 7% 4 5% 5% 4 6% 9% 38%	7384
	21st to end	Day	18% 8% 3 9% 5% 5% 5% 4 7% 8% 28%	8841
June	1st to 10th	Day	7% 4 2 6% 5% 5% 5% 6% 7% 9% 43%	2940
	11th to 20th	Day	6% 4 2 5% 5% 4 5% 5% 9% 11% 45%	2871
	21st to end	Day	4 4 1 4 5% 5% 4 5% 7% 9% 52%	2800
July	1st to 10th	Day	6% 5% 2 6% 5% 5% 6% 5% 8% 10% 42%	5994
	11th to 20th	Day	5% 3 1 4 4 4 5% 4 6% 10% 55%	5900
	21st to end	Day	9% 6% 2 7% 5% 4 5% 4 6% 9% 43%	6422
August	1st to 10th	Day	3 2 1 4 3 3 4 3 6% 8% 62%	4181
	11th to 20th	Day	9% 5% 2 6% 4 5% 5% 4 6% 9% 44%	3849
	21st to end	Day	6% 4 2 4 4 4 5% 5% 7% 8% 53%	4312
September	1st to 10th	Day	10% 5% 2 5% 4 5% 5% 4 6% 8% 46%	2400
	11th to 20th	Day	13% 5% 1 5% 4 3 4 4 5% 8% 47%	2400
	21st to end	Day	9% 5% 1 5% 4 4 4 3 5% 7% 54%	2126
October	1st to 10th	Day	9% 3 1 3 3 3 3 3 5% 6% 60%	2000
	11th to 20th	Day	12% 5% 2 4 3 3 3 2 3 6% 58%	2000
	21st to end	Day	19% 5% 2 4 2 3 3 2 4 5% 50%	2200
November	1st to 10th	Day	13% 6% 2 4 3 3 2 3 3 5% 56%	2058
	11th to 20th	Day	11% 6% 2 6% 3 3 3 3 5% 7% 53%	1909
	21st to end	Day	20% 6% 2 6% 4 3 3 2 4 5% 45%	1890
December	1st to 10th	Day	18% 6% 2 5% 4 3 3 3 3 4 50%	2690
	11th to 20th	Day	19% 7% 3 6% 4 4 3 2 4 4 45%	3088
	21st to end	Day	19% 7% 3 7% 5% 4 4 3 4 5% 39%	4188
January	1st to 10th	Night	18% 7% 2 5% 4 3 3 2 4 5% 48%	7634
	11th to 20th	Night	11% 5% 2 4 3 2 3 2 3 4 62%	7680
	21st to end	Night	22% 8% 2 5% 3 3 3 2 4 4 44%	8402
February	1st to 10th	Night	21% 8% 2 5% 4 3 3 3 4 4 43%	2730
	11th to 20th	Night	20% 7% 2 5% 3 3 3 3 4 6% 45%	2474
	21st to end	Night	18% 6% 2 6% 4 4 3 3 4 4 48%	2076
March	1st to 10th	Night	19% 7% 3 6% 3 3 3 2 4 4 44%	5103
	11th to 20th	Night	10% 5% 2 6% 4 4 3 3 4 7% 52%	5090
	21st to end	Night	13% 6% 2 6% 4 4 3 3 5% 7% 46%	5479
April	1st to 10th	Night	13% 5% 2 5% 3 3 4 3 5% 8% 49%	2100
	11th to 20th	Night	12% 5% 2 4 3 4 4 3 5% 8% 50%	2075
	21st to end	Night	14% 5% 3 6% 5% 3 4 3 5% 6% 46%	2100
May	1st to 10th	Night	17% 9% 3 6% 4 4 4 3 5% 7% 38%	5832
	11th to 20th	Night	15% 8% 3 8% 4 4 4 3 6% 6% 39%	5491
	21st to end	Night	19% 8% 3 8% 5% 5% 5% 4 6% 6% 31%	5340
June	1st to 10th	Night	6% 4 2 6% 4 4 5% 5% 7% 11% 47%	1680
	11th to 20th	Night	3 3 1 4 4 4 4 3 7% 8% 58%	1640
	21st to end	Night	3 3 1 3 4 3 4 4 7% 9% 59%	1600
July	1st to 10th	Night	6% 4 2 6% 4 5% 6% 5% 7% 10% 46%	3977
	11th to 20th	Night	4 2 1 4 3 3 4 4 6% 12% 56%	4077
	21st to end	Night	8% 5% 3 6% 4 4 4 3 6% 9% 48%	4449
August	1st to 10th	Night	1 2 1 3 2 2 3 3 6% 8% 67%	2974
	11th to 20th	Night	4 3 1 4 3 4 5% 4 7% 10% 55%	3200
	21st to end	Night	4 3 1 4 3 4 4 3 6% 9% 57%	3586
September	1st to 10th	Night	8% 4 2 6% 3 4 3 3 5% 7% 54%	2000
	11th to 20th	Night	10% 5% 2 5% 4 4 4 4 5% 6% 52%	2000
	21st to end	Night	9% 5% 2 4 3 3 3 3 5% 6% 58%	2249
October	1st to 10th	Night	8% 4 1 4 2 3 3 3 5% 7% 62%	2400
	11th to 20th	Night	10% 5% 1 4 3 3 3 2 4 4 62%	2400
	21st to end	Night	17% 5% 2 4 4 3 2 2 3 4 53%	2640
November	1st to 10th	Night	11% 5% 2 5% 4 2 3 3 4 5% 56%	2460
	11th to 20th	Night	13% 3 1 4 3 2 3 2 4 6% 58%	2708
	21st to end	Night	15% 6% 2 5% 3 3 3 3 4 5% 50%	2730
December	1st to 10th	Night	15% 6% 2 5% 3 3 3 3 4 5% 51%	4717
	11th to 20th	Night	18% 8% 3 6% 4 3 3 2 3 4 46%	5339
	21st to end	Night	21% 7% 2 6% 4 3 4 3 4 5% 41%	7027

Transparency (when cloud cover <= 30%)
Color Meanings: Too cloudy to forecast Poor Below Average Average Above average Transparent
Month	Days in Month		Occurrence of each Forecast	Data Points
January	1st to 10th	Day	41% 3 9% 30% 15% 2	5290
	11th to 20th	Day	35% 2 6% 22% 30% 5%	5310
	21st to end	Day	40% 2 5% 20% 26% 7%	5812
February	1st to 10th	Day	46% 4 10% 22% 15% 3	1890
	11th to 20th	Day	44% 4 8% 21% 17% 5%	2039
	21st to end	Day	47% 4 7% 16% 18% 8%	1730
March	1st to 10th	Day	50% 4 6% 16% 13% 11%	5001
	11th to 20th	Day	33% 4 7% 22% 23% 12%	5090
	21st to end	Day	42% 4 8% 26% 19% 1	5692
April	1st to 10th	Day	38% 5% 9% 23% 21% 3	2520
	11th to 20th	Day	40% 5% 9% 22% 18% 7%	2494
	21st to end	Day	43% 6% 10% 22% 17% 1	2520
May	1st to 10th	Day	44% 7% 9% 21% 17% 2	7056
	11th to 20th	Day	41% 8% 13% 22% 14% 2	7388
	21st to end	Day	51% 8% 12% 16% 11% 1	8855
June	1st to 10th	Day	34% 8% 13% 26% 17% 1	2940
	11th to 20th	Day	30% 8% 15% 27% 17% 3	2871
	21st to end	Day	27% 8% 14% 26% 21% 4	2800
July	1st to 10th	Day	32% 10% 15% 27% 15% 1	5930
	11th to 20th	Day	23% 8% 16% 37% 14% 2	5831
	21st to end	Day	36% 8% 14% 30% 11% 1	6240
August	1st to 10th	Day	19% 6% 16% 34% 22% 4	4167
	11th to 20th	Day	35% 7% 15% 30% 12% 1	3885
	21st to end	Day	26% 7% 13% 32% 20% 3	4311
September	1st to 10th	Day	35% 7% 10% 23% 17% 7%	2400
	11th to 20th	Day	35% 6% 11% 20% 24% 5%	2400
	21st to end	Day	31% 6% 9% 21% 28% 7%	2126
October	1st to 10th	Day	16% 3 5% 14% 39% 23%	3260
	11th to 20th	Day	19% 2 4 21% 39% 14%	3240
	21st to end	Day	29% 4 5% 29% 26% 6%	3538
November	1st to 10th	Day	32% 3 7% 26% 24% 8%	2058
	11th to 20th	Day	32% 4 8% 22% 26% 9%	1909
	21st to end	Day	43% 3 6% 21% 22% 5%	1890
December	1st to 10th	Day	40% 3 7% 26% 22% 3	2690
	11th to 20th	Day	44% 3 6% 24% 19% 4	3085
	21st to end	Day	47% 4 7% 24% 14% 3	4188
January	1st to 10th	Night	40% 3 9% 30% 17% 2	7635
	11th to 20th	Night	28% 3 6% 20% 34% 8%	7680
	21st to end	Night	44% 3 8% 18% 21% 6%	8402
February	1st to 10th	Night	46% 3 7% 22% 18% 4	2730
	11th to 20th	Night	43% 3 7% 22% 19% 6%	2475
	21st to end	Night	40% 4 7% 18% 22% 9%	2076
March	1st to 10th	Night	43% 4 6% 15% 19% 12%	5103
	11th to 20th	Night	33% 4 7% 25% 18% 13%	5090
	21st to end	Night	38% 4 9% 26% 20% 3	5479
April	1st to 10th	Night	34% 4 11% 25% 20% 7%	2100
	11th to 20th	Night	33% 4 10% 24% 20% 9%	2075
	21st to end	Night	38% 5% 10% 22% 21% 3	2100
May	1st to 10th	Night	45% 7% 11% 20% 14% 2	5862
	11th to 20th	Night	45% 6% 12% 20% 12% 5%	5492
	21st to end	Night	51% 9% 12% 14% 11% 3	5351
June	1st to 10th	Night	28% 8% 13% 27% 21% 3	1680
	11th to 20th	Night	23% 5% 14% 31% 24% 4	1640
	21st to end	Night	20% 6% 14% 31% 23% 7%	1600
July	1st to 10th	Night	31% 9% 14% 24% 21% 1	3934
	11th to 20th	Night	19% 8% 18% 35% 17% 3	4026
	21st to end	Night	32% 7% 14% 31% 16%	4320
August	1st to 10th	Night	14% 5% 16% 38% 23% 4	2964
	11th to 20th	Night	22% 8% 19% 33% 16% 2	3230
	21st to end	Night	23% 7% 11% 28% 27% 4	3586
September	1st to 10th	Night	30% 5% 10% 25% 20% 9%	2000
	11th to 20th	Night	32% 6% 9% 23% 24% 7%	2000
	21st to end	Night	28% 5% 9% 20% 29% 9%	2249
October	1st to 10th	Night	14% 3 6% 15% 32% 29%	3920
	11th to 20th	Night	17% 2 3 15% 38% 24%	3899
	21st to end	Night	28% 3 6% 21% 29% 12%	4252
November	1st to 10th	Night	30% 4 7% 23% 26% 9%	2460
	11th to 20th	Night	29% 3 5% 25% 27% 10%	2708
	21st to end	Night	37% 3 7% 21% 26% 5%	2730
December	1st to 10th	Night	36% 3 7% 31% 19% 3	4717
	11th to 20th	Night	44% 3 5% 21% 21% 6%	5341
	21st to end	Night	45% 5% 8% 23% 15% 3	7027

Seeing (when cloud cover <= 80%)
Color Meanings: Too cloudy to forecast Bad 1/5 Poor 2/5 Average 3/5 Good 4/5 Excellent 5/5
Month	Days in Month		Occurrence of each Forecast	Data Points
January	1st to 10th	Day	24% 12% 35% 21% 7% 1	330
	11th to 20th	Day	22% 14% 42% 20% 3	330
	21st to end	Day	19% 11% 41% 24% 5%	363
February	1st to 10th	Day	25% 12% 38% 18% 7% 1	330
	11th to 20th	Day	22% 20% 37% 17% 3	330
	21st to end	Day	29% 16% 34% 14% 6% 1	273
March	1st to 10th	Day	24% 14% 35% 20% 7% 1	330
	11th to 20th	Day	24% 16% 37% 20% 3	330
	21st to end	Day	18% 18% 38% 19% 6%	406
April	1st to 10th	Day	18% 12% 32% 28% 9% 1	540
	11th to 20th	Day	18% 11% 36% 25% 7% 2	532
	21st to end	Day	18% 10% 34% 25% 12% 2	540
May	1st to 10th	Day	16% 11% 30% 32% 10% 1	543
	11th to 20th	Day	14% 6% 24% 30% 18% 6%	686
	21st to end	Day	11% 4 20% 34% 22% 8%	844
June	1st to 10th	Day	9% 5% 13% 31% 30% 13%	780
	11th to 20th	Day	6% 4 11% 33% 33% 13%	756
	21st to end	Day	4 2 15% 31% 32% 16%	730
July	1st to 10th	Day	6% 1 10% 26% 37% 20%	721
	11th to 20th	Day	5% 1 8% 29% 38% 19%	718
	21st to end	Day	7% 3 7% 25% 39% 19%	794
August	1st to 10th	Day	5% 2 9% 31% 38% 15%	699
	11th to 20th	Day	13% 1 9% 24% 34% 20%	519
	21st to end	Day	10% 2 5% 22% 37% 24%	583
September	1st to 10th	Day	10% 2 8% 24% 40% 16%	530
	11th to 20th	Day	11% 1 11% 22% 32% 23%	530
	21st to end	Day	12% 2 18% 28% 29% 12%	417
October	1st to 10th	Day	8% 3 21% 30% 31% 7%	330
	11th to 20th	Day	11% 7% 31% 27% 19% 5%	330
	21st to end	Day	25% 11% 26% 23% 11% 4	363
November	1st to 10th	Day	17% 9% 30% 27% 16% 2	330
	11th to 20th	Day	10% 10% 37% 30% 12% 2	330
	21st to end	Day	24% 12% 28% 23% 11% 2	330
December	1st to 10th	Day	22% 11% 33% 21% 11% 2	330
	11th to 20th	Day	24% 12% 36% 18% 10% 1	330
	21st to end	Day	26% 17% 32% 21% 4 1	363
January	1st to 10th	Night	22% 8% 34% 30% 6%	1050
	11th to 20th	Night	21% 8% 40% 28% 3	1050
	21st to end	Night	20% 7% 40% 29% 3	1155
February	1st to 10th	Night	24% 8% 33% 30% 5%	1050
	11th to 20th	Night	24% 8% 37% 27% 3	839
	21st to end	Night	21% 13% 37% 27% 2	692
March	1st to 10th	Night	22% 8% 34% 32% 5%	667
	11th to 20th	Night	21% 10% 34% 31% 4 1	630
	21st to end	Night	18% 9% 34% 30% 8%	693
April	1st to 10th	Night	15% 9% 36% 32% 8%	630
	11th to 20th	Night	14% 9% 33% 34% 10% 1	623
	21st to end	Night	14% 6% 35% 32% 12% 1	630
May	1st to 10th	Night	15% 6% 24% 42% 13% 1	630
	11th to 20th	Night	15% 6% 28% 33% 17% 2	621
	21st to end	Night	11% 4 19% 37% 24% 4	683
June	1st to 10th	Night	6% 2 13% 40% 34% 5%	630
	11th to 20th	Night	3 2 8% 45% 39% 3	615
	21st to end	Night	4 10% 36% 44% 5%	600
July	1st to 10th	Night	4 2 6% 35% 43% 10%	585
	11th to 20th	Night	5% 1 6% 29% 50% 8%	582
	21st to end	Night	7% 1 6% 31% 45% 9%	657
August	1st to 10th	Night	3 1 6% 37% 46% 8%	597
	11th to 20th	Night	7% 1 7% 34% 43% 8%	594
	21st to end	Night	8% 1 6% 28% 49% 8%	660
September	1st to 10th	Night	8% 2 8% 34% 44% 4	600
	11th to 20th	Night	11% 3 10% 29% 42% 6%	600
	21st to end	Night	11% 2 13% 35% 35% 4	740
October	1st to 10th	Night	10% 3 15% 36% 35% 3	800
	11th to 20th	Night	12% 4 26% 37% 21% 1	800
	21st to end	Night	19% 5% 26% 33% 16% 1	880
November	1st to 10th	Night	13% 5% 28% 36% 17% 1	820
	11th to 20th	Night	12% 7% 30% 39% 11%	840
	21st to end	Night	18% 7% 30% 32% 12% 1	840
December	1st to 10th	Night	20% 8% 30% 35% 6%	1047
	11th to 20th	Night	23% 6% 30% 34% 6%	1050
	21st to end	Night	23% 9% 32% 30% 5%	1155

Page generated at 2026-06-13 01:31:44. Version ac07

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